ABB PM802F

Product Features

ABB PM802F features a Super Scalar RISC microprocessor with a maximum performance of 150 MIPS, equipped with 16K internal CPU cache RAM (with error detection and correction functionality).

ABB PM802F has a storage configuration of 4MB static RAM (for real-time data and configuration, with battery backup), 4MB Flash EPROM (32-bit word length), and 16Kbit serial EEPROM.

ABB PM802F supports 4 fieldbus module slots (F1-F4), compatible with various types of modules such as PROFIBUS-DP, CAN, and serial interfaces (e.g., FI 830F, FI 810F).

ABB PM802F is equipped with 2 Ethernet communication module slots (E1-E2), supporting interfaces such as 10Base2, AUI, and 10BaseT (e.g., EI 801F, EI 803F), with a data transfer rate of 10 Mbit/s and CPU overhead < 4%.

ABB PM802F is implemented using two AC 800F units, with redundant links synchronizing data via the second Ethernet module to ensure seamless takeover by the standby unit in case of a primary unit failure (without disruption).

ABB PM802F provides power failure protection for RAM data and real-time clock via Ethernet modules or battery modules (e.g., AM 801F), with a new battery lasting ≥1.5 years and ≥10 days after low-battery warning.

Fieldbus modules and communication modules are hot-swappable, with automatic configuration updates during replacement.

ABB PM802F includes built-in temperature monitoring and a watchdog, supporting module identification (including factory and operational parameters). Integrated LED indicators display real-time information on power status, operational status, and faults, with support for remote diagnostics.

Product Using Principle

ABB PM802F periodically collects signals from field sensors via the fieldbus module, processes them using the user-programmed control program within the internal CPU, and then sends control commands to the actuator via the fieldbus module to achieve closed-loop process control.

When configured with dual AC 800F units, the primary unit synchronizes configuration data, real-time commands, and status information to the secondary unit via a second Ethernet module. If the primary unit fails, the secondary unit immediately takes over control after detecting the failure via the redundant link. The switching process is transparent to the upper-level system, ensuring uninterrupted production.  

Configuration information and real-time data are stored in RAM. In the event of a power outage, data is maintained by power from the Ethernet module or the battery module (AM 801F), preventing configuration loss upon restart. Low battery levels are indicated by an LED alarm, ensuring timely maintenance.

Communication with the operator station and engineering station is achieved through the Ethernet system bus of the first Ethernet module, supporting configuration downloads and module status reporting; communication with field devices is completed through modules connected via four fieldbus slots, supporting parallel processing of multiple protocols.  

Product Parameter

The following detail is for ABB PM802F Basic Unit.